Flat 3 Carysfort House West Halkin Street London SW1X 8JS

This site has had 2 applications since 2026.

• 26/05493/LBC Awaiting decision

  Flat 3 Carysfort House West Halkin Street London SW1X 8JS

  Replacement of single glazed windows at the ground floor flat front elevation, with slimline double glazed windows in matching style.

  Submitted 12 Aug 2026 Heritage and listed buildings

1. 12 Aug 2026

   Received by Westminster

2. 18 Aug 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 7 October 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Westminster took a median of 86 days over the applications it decided in the last year.

This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided full applications in a median of 119 days. More in our guide to how long planning decisions take.

A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.

• Flat 3 Carysfort House West Halkin Street London SW1X 8JS

  26/05493/LBC Submitted 12 Aug 2026 50 yards away

  90% historically approved · decision due ~7 Oct

  Replacement of single glazed windows at the ground floor flat front elevation, with slimline double glazed windows in matching style.

  Awaiting decision Heritage and listed buildings Windows or glazing

• 15 Halkin Mews London SW1X 8JZ

  25/08082/FULL Submitted 6 Nov 2025 50 yards away

  Installation of security bars to front ground floor windows.

  Refused Full applications Windows or glazing 18 docs

• 15 Halkin Mews London SW1X 8JZ

  25/08066/LBC Submitted 5 Nov 2025 50 yards away

  Installation of two sets of window security bars to the existing ground floor front windows.

  Decided Heritage and listed buildings Windows or glazing 14 docs

• 3C Motcomb Street London SW1X 8JU

  26/03200/LBC Submitted 14 May 2026 50 yards away

  90% historically approved · decision due ~9 Jul

  Extension of the existing fire escape platform and replacement of the fire escape door. [Linked to 26/03199/FULL]

  Awaiting decision Heritage and listed buildings Extension 10 docs

• Flat 4 16 West Halkin Street London SW1X 8JL

  25/07921/FULL Submitted 31 Oct 2025 50 yards away

  Creation of terrace on flat roof and replacement of a window with a door to access the terrace.

  Withdrawn Full applications Windows or glazing 20 docs

• 5A Motcomb Street London SW1X 8JU

  23/04821/TCA Submitted 13 Jul 2023 50 yards away

  T1253 1 x Robinia pseudoacacia (Golden False Acacia) - Prune from adjacent structure to clear building and chimney by 1.5 m, removing regrowth only.

  Granted Trees 6 docs

• 26/05984/FULL Decided

  41 Sutherland Street London SW1V 4JX

  Replacement of front, side and rear windows with double glazed timber framed sash windows and replacement of a door with a double glazed timber framed door.

  Received 2 Sep, published by the council 11 Sep 2026 Full applications
• 26/07229/FULL Awaiting decision

  5 D'arblay Street London W1F 8DL

  Painting of the shopfront facade and alterations to the existing fixed windows to form two openable sash windows. (Linked with 26/07230/ADV)

  Received 22 Oct, published by the council 26 Oct 2026 Full applications
• 26/07224/FULL Awaiting decision

  8 Hinde Street London W1U 3BQ

  Use of the building as an Embassy (sui generis) with reversion to Class E on cessation of occupation by the Government of the United Mexican States. Erection of a flagpole to front elevation.

  Received 22 Oct, published by the council 26 Oct 2026 Full applications
• 26/06134/FULL Decided

  Flat 10H Hyde Park Mansions Cabbell Street London NW1 5BG

  Replacement of front and rear second floor level windows with slim-profile double-glazed panels, retaining the existing window and door frames.

  Received 8 Sep, published by the council 15 Sep 2026 Full applications
• 26/07258/FULL Awaiting decision

  16A Croxley Road London W9 3HL

  Installation of air to air heat pumps to offices and bedrooms.

  Received 22 Oct, published by the council 23 Oct 2026 Full applications